To rob a bank wearing a Guy Fawkes mas in BitLife, you must first locate the crime tab and select bank robbery. Selecting bank robbery will then send you to the nearest bank.
The bank robbery option under crime will also give players the choice of both weapons and disguises to use during the robbery. Both options will appear in a tab right after clicking the bank robbery option under crime.
You will need to click it in the disguise section and scroll down until you see a Guy Fawkes mask. If you see the mask, select it and then use it to rob the bank.
Doing so will allow you to rob a bank wearing a Guy Fawkes Mask in BitLife and complete the objective in the V challenge.
However, you should keep in mind that if your character doesn't have a history of crime, there's a good chance you're going to jail. For the most part, this won't be a big issue as some of the other objectives require it. On the other hand, you will miss out on completing the communist manifesto objective.
Because of this, we recommend taking a trip to the read-a-book option under mind and body and getting that manifesto objective checked off.